diff --git a/enable-tls-between-clients-and-servers.md b/enable-tls-between-clients-and-servers.md
index 06994c28b7dd5..cf2bda67b4649 100644
--- a/enable-tls-between-clients-and-servers.md
+++ b/enable-tls-between-clients-and-servers.md
@@ -183,4 +183,4 @@ The newly loaded certificate, key, and CA take effect on the connection that is
 
 ### See also
 
-- [Enable TLS Between TiDB Components](/enable-tls-between-components.md)。
+- [Enable TLS Between TiDB Components](/enable-tls-between-components.md).
diff --git a/predicate-push-down.md b/predicate-push-down.md
index c2be2f77c6302..b574db739fedb 100644
--- a/predicate-push-down.md
+++ b/predicate-push-down.md
@@ -108,7 +108,7 @@ explain select * from t left join s on t.a = s.a where s.a is null;
 6 rows in set (0.00 sec)
 ```
 
-In this query，there is a predicate `s.a is null` on the inner table `s`。
+In this query，there is a predicate `s.a is null` on the inner table `s`.
 
 From the `explain` results，we can see that the predicate is not pushed below join operator. This is because the outer join fills the inner table with `NULL` values when the `on` condition isn't satisfied, and the predicate `s.a is null` is used to filter the results after the join. If it is pushed down to the inner table below join, the execution plan is not equivalent to the original one.
 
diff --git a/sql-statements/sql-statement-show-analyze-status.md b/sql-statements/sql-statement-show-analyze-status.md
index 4d31e91e7a8ad..874a70595ea04 100644
--- a/sql-statements/sql-statement-show-analyze-status.md
+++ b/sql-statements/sql-statement-show-analyze-status.md
@@ -1,6 +1,6 @@
 ---
 title: SHOW ANALYZE STATUS
-summary: An overview of the usage of SHOW ANALYZE STATUS for the TiDB database。
+summary: An overview of the usage of SHOW ANALYZE STATUS for the TiDB database.
 aliases: ['/docs/dev/sql-statements/sql-statement-show-analyze-status/']
 ---
 
diff --git a/sql-statements/sql-statement-show-histograms.md b/sql-statements/sql-statement-show-histograms.md
index ee3ee952f6692..333a791532c65 100644
--- a/sql-statements/sql-statement-show-histograms.md
+++ b/sql-statements/sql-statement-show-histograms.md
@@ -1,6 +1,6 @@
 ---
 title: SHOW STATS_HISTOGRAMS
-summary: An overview of the usage of SHOW HISTOGRAMS for TiDB database。
+summary: An overview of the usage of SHOW HISTOGRAMS for TiDB database.
 aliases: ['/docs/dev/sql-statements/sql-statement-show-histograms/']
 ---
 
diff --git a/tidb-binlog/tidb-binlog-faq.md b/tidb-binlog/tidb-binlog-faq.md
index a8fbdcdb015e0..596e2169e08e5 100644
--- a/tidb-binlog/tidb-binlog-faq.md
+++ b/tidb-binlog/tidb-binlog-faq.md
@@ -244,7 +244,7 @@ To solve the problem, follow these steps:
 3. Check `drainer.log`. Search for the failed DDL operation and find the `commit-ts` of this operation. For example:
 
     ```
-    [2020/05/21 09:51:58.019 +08:00] [INFO] [syncer.go:398] ["add ddl item to syncer, you can add this commit ts to `ignore-txn-commit-ts` to skip this ddl if needed"] [sql="ALTER TABLE `test` ADD INDEX (`index1`)"] ["commit ts"=416815754209656834]。
+    [2020/05/21 09:51:58.019 +08:00] [INFO] [syncer.go:398] ["add ddl item to syncer, you can add this commit ts to `ignore-txn-commit-ts` to skip this ddl if needed"] [sql="ALTER TABLE `test` ADD INDEX (`index1`)"] ["commit ts"=416815754209656834].
     ```
 
 4. Modify the `drainer.toml` configuration file. Add the `commit-ts` in the `ignore-txn-commit-ts` item and restart the Drainer node.
diff --git a/user-defined-variables.md b/user-defined-variables.md
index 470287ea2c608..43bd94f8b7bd7 100644
--- a/user-defined-variables.md
+++ b/user-defined-variables.md
@@ -86,7 +86,7 @@ SELECT @a1, @a2, @a3, @a4 := @a1+@a2+@a3;
 +------+------+------+--------------------+
 ```
 
-Before the variable `@a4` is modified or the connection is closed, its value is always `7`。
+Before the variable `@a4` is modified or the connection is closed, its value is always `7`.
 
 If a hexadecimal literal or binary literal is used when setting the user-defined variable, TiDB will treat it as a binary string. If you want to set it to a number, you can manually add the `CAST` conversion, or use the numeric operator in the expression: